Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas tentativas contra têm uma diferença de tentativas de -17 e pontos menores que 80?
 ###Tabelas: CREATE TABLE list_of_member_schools (list_of_member_schools_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Team Name VARCHAR, Town VARCHAR, County VARCHAR, School Enrollment (2008–10) INT, Football? VARCHAR) CREATE TABLE pool_2 (pool_2_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Tries for INT, Tries against INT, Try diff VARCHAR, Points for INT, Points against INT, Points diff VARCHAR) CREATE TABLE 1975_engines (1975_engines_id AUTO_INCREMENT PRIMARY KEY, Engine VARCHAR, Horsepower VARCHAR, Torque VARCHAR, Carburetor VARCHAR, Compression Ratio VARCHAR, Bore & Stroke VARCHAR, VIN Code VARCHAR) CREATE TABLE timeline_of_tallest_buildings (timeline_of_tallest_buildings_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Street address VARCHAR, Years as tallest VARCHAR, Height ft (m) VARCHAR, Floors VARCHAR, Architect VARCHAR) CREATE TABLE list_of_locomotives (list_of_locomotives_id AUTO_INCREMENT PRIMARY KEY, LTSR No. INT, LTSR Name VARCHAR, Builder VARCHAR, Built INT, MR No. INT, LMS 1930 No. INT, BR No. INT, Withdrawn INT)  
SELECT COUNT Tries against FROM pool_2 WHERE Try diff = –17 AND Points for < 80